Improvement in emery grinding-wheels



S. G. MORRISON.

EMERY ummm-WHEEL. No.172,3`37. Patented Jan. 1a, 187e.

ffy- 5..

W/zeppw.- v lime/fom 2) wf ma l ffm h/n m NTTED STATES PATENT QFEICE.

SAMUEL Gr. MORRISON, 0F WILLIAMSPORT, PENNSYLVANIA.

IMPROVEMENT lN EMERV GRlNDlNG-WHEELS.

Specification forming part of Letters Patent N o. 172,337, dated January 18, 1876 application filed May 27, 1875.

To all whom it may concern:

Be it known that I, SAMUEL G. MORRISON, of .Williamsporu Pennsylvania, have invented an Emery Grinding-Wheel, (being an improvement upon my patent emery-wheel, dated May 11, 187 5, N o. 1,025,) of which the following is a speoiiication The object of my invention is to form an emery grinder on a metal plate truly centered, carrying the emery substance or grinding-suhstanoe upon the edge of the metal plate, permanently attached thereto, and ot' any desired thickness greater than the thickness of the metal plate.

The construction or" my emery grinder is illnstrated more in detail in the plan view, Figure 1, in the drawings forming part of this specification,aseotion ofthe grinding-body being left off for the purpose of exhibiting the form and structure of the metal plate. The plate may be made of enst or wrought metal, truly centered, With a hole suitable to go upon an arbor, and ot' suoli` diameter and proportion as to allow of an attachment of the grinding substance suited to the intended speed ofthe wheel. The periphery of the plate has a rib on either side thereof, and at suitable points the outer edge of the plate is out through radially by dovetails, after Whioh the plate intended to receive and hold the grinding substance is placed in the iron mold, and secured so as to receive in molding the required amount of the composition on either side and around it.

A is the metal plate, out through at its di'- alneter. (Shown in Fig. 3.) The rib is shown by b b b b in Fig. 1. The dovetails are shown bya a a aa, in Fig. 1. C shows the emery grinding substance. Fig. 2 is a face View of the periphery ofthe plate.

I do not claim emery grinders with metal, Wood, or stone Centers, for I am aware sueh are in use; but

What I do claim is- A metal-plate center with dovetails a a a, a and rib b, in combination With a body of' eineery or other grinding substances, substantially as and for the purpose specified.

SAMUEL G. MORRISON.

Witnesses:

HEPBUEN MCCLUEE, STEPHEN W. HALL. 

